Sifting, scalping, and grading machine.



No. 645,453.l

Patentedv Mar. I3, |900. W. L. BURNER.

SIFTING, SCALPING, AND GRADING MACHINE.

(Application led Feb. 1, 1898..)

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3 Sheets-Sheet 2 Patented Mar. I3, |900.

W. L. BURNER.

(Application led Feb. 1,'1898.)

/l//l/ll/l SCALPING, vAND GRDIG MACHINE.

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w. L. BURNER. SIFTING, SIALPING, AND GRADING MACHINE.

(Application filed. Feb. 1, 1898.)

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UNITnD-'STATEs PATENT trios,

WILLIAM L. BURNER, OF COLUMBUS', OHIO, AssicNoR To Tun OASE MANUFACTURING COMPANY, or SAME PLACE.

SIFTING, scALPINc, AND GRADING MACHINE.

SPECIFICATION forming part of Letters Patent No. 645,453, dated March 13, 19O; Application tiled February 1, 1898. Serial No. 668,764. (No model.)

T0 M whom t pta/y concern,.-

Be it known that I, WILLIAM L. BURNER, a citizen of the United States, and a resident of Columbus, in the county of Franklin and State of Ohio, have invented an Improved Bolter, of which the following is a specificai The machine is designed as an improved `tlatsieve apparatus for boltingvor sifting, scalping, and grading flour, meal, middlings, and other material. When all conditions are favorable, the stock passing through almost the entire length of a dat sieve is suitablev for flour. 'Under other conditions-for example, during bad weather or when Working poor grain-there might not be more that onehalf fit to send to the' flour-outlet, While the rest requires to be cut off and sent back with other stock to be resifted or sent with the Oal.

One feature of the present invention consists ot' cut-offs comprising longitudinal and transverse partitions dividing the space beneath the vlower sieves into transverse sections or compartments and a corresponding series of spouts,into one end of each of which is delivered the material from the appropriate section or compartment beneath the bottom of the lower sieve, the other ends of which spouts empty into sleeves leading into a receptacle or receptacles wherein are located suitable cant-boards or valves to determine the ultimate course of the different grades of material received from each individual section or compartment. This arrangement is especially adapted for shaking-screens in which one end of the sleeves must be in motion with the screen, while the other end is stationary with the receptacles. At these receptacles the stock passing out of any one of the sleeves may be readily examined by opening the appropriate door in the side of the receptacle. i

A further feature consists of a peculiar form vof hoppering by means of which the stock passing through the Whole length of a lower sieve is delivered into a shorter space, whereby room is left in which to bring down the siftings from the bottoms of additional sieves through spouts and sleeves which discharge behind the first series of spouts and.

sleeves in receptacles located at opposite ends of the receptacles receiving from said first se'L ries of spouts and sleeves. Itis therefore ail easy matter to examine and cut olf at will the stock from any one of the lowersieves and to hopper the stock to one or both ends or to the middle.

A further feature of the invention relates to automatic brushes for cleaning the cloth of the sieves as the same becomes choked by the flour, meal, middlings, or other material sticking in the meshes. It is common to keep the meshes open by means of brushes Working either above or below the sieve provided with positive mechanical means for moving the brushes. According to this part of my invention I provide the brush with an auto; matically advancing and reversing pawl actuated Wholly by the inertia of the brush and which obtains a progressive step-by-step movement either transversely or longitudinally of the sieve from the movement of the screen. The brush is fastened to a bar placed so as to hold the brush movably underthe sieve in position to brush the bottom of the cloth. The motion of the screen throws the brush intermittently forward, it being pre- Vented from going back With the return mo- 'tion of the screen by means 'of the pawl Working in notches on the bar. When the ybrush reaches one side or end of the sieve, the pawl drops into a depression and reverses, after which the brush progresses in the opposite direction.v This is repeated so long as the screen is in motion, and the brush continually Works back and forth under the sieve. If long brushes are used, they may be provided With a parallel-link movement to maintain the brush in a position transverse to the line of travel, in ,which case the bar is curved to coincide with the path of the pawl. viously the parts may be interchanged, the pawl being attached to the sieve-frame and the notched bar being secured to the movable brush. A Wire is preferably located to clean the brushes as they pass it, which Wire may be set at an angle, so as to` scrape more or less along the length of the brush, causing less friction against the brushes. Brushes thus arranged are applicable to any sievemachines, Whether they have a gyrating, ro-

IOO

tary, eccentric, or other motion and whether used for bolting, scalping, grading, or sifting. A long brush working sidewise is preferable for iouring-sieves with cut-offs, as the brushes working from end to end would cause a mixing of the stock under the sieves, Icarrying dirty stock from the tail to the head or the reverse.

The several parts of my invention are not to be confined to the particular details described, but may cover any means by which the several functions may be accomplished. For instance, a smooth bar may be substituted for the notched bar, against which a pawl in the form of a cam will work, preventing a backward motion until the brush reaches the side or end, when it is reversed by dropping into a notch or tripped or thrown over, or any similar means of reversing the pawl or throwing another one into position, giving a reverse motion to the brush, or any similar reversible pawl attached to a brush for cleaning sieves having a gyratin g, rotary, or other motion and used for the purpose of sifting.

My invention will be fully understood upon reference to the accompanying drawings, in which- Figure 1 is a vertical section of a machine constructed in accord ance with my invention, the section being taken on the line 1 1, Figs. 3, 4, and 5. Fig. 2 is a section in a plane parallel to the plane of Fig. 1, but on the line 2 2, Figs. 3, 4, and 5. Fig. 3 is an irregular horizontal section ofl the machine arranged to show the different sections or compartments into which the bottoms beneath the lower sieves are divided. Fig. fi is a horizontal section on the line 4 4, Figs. 1, 2, and 5, showing thearrangement of the receptacles at one side of the machine into which the spouts empty. Fig. 5 is a central vertical transverse section of vthe machine on the line 5 5, Fig. 3. Fig. 6 is a detail view showing the automaticallytraveling cleaning-brush beneath the sievecloth sliding on ways. Fig. 7 illustrates another construction of the same device. Fig. S is a plan view of the brusheframe shown in Fig. 7, together with the notched bar which connects the brushes and by means of which they are moved. Fig. 9 illustrates .a construction similar in principle to that shown in Fig. 6, but having the additional feature of means for tripping and reversing the pawl at each end movement of the brush. Fig. 10 is' a plan view illustrating means whereby the automatically-moving brush is maintained in a position parallel to the sides of the sieve.

Referring to Figs. 1 to 5, 1 represents a screen, and 2 a finishing-sieve in said screen to which the material may be fed through a spout 3cr as siftings through the outlet 4 of a carrying-board 5 beneath a preceding sieve 6, where the material has been previously treated. The sieve 2 may be preceded by any number of such preliminary sieves, as illustrated by the carrying-board 5, having outlet et and sieve 6a. As shown in Fig. 5, the screen 1 may be divided into a number of longitudinal sections or compartments 2a 2b and 2C Qdby'means of vertical longitudinal partitions 1a. adapted to treat different grades of material simultaneously. Each of the longitudinal sieve-sections orcompartments thus provided has an independent bottom 7u 7'b '7c 7d, upon which is delivered and separated all the material passing through the corresponding lon gitudinal sections or compartments for the purpose of separating material Apassing through different portions of thelength of the several longitudinal sections or compartments. The bottoms 7a 7l '7c 7d are further divided up by means of series of vertical partitions 8"L 8* Sc 8d into transverse sections or compartments providing chutes. By this means I am not only enabled to keep separate the material passing through the different longitudinal sections or compartments, but also to separate the material passing through dierent portions of the length of the lower sieves. In order to conveniently deliver the siftings separated as above described, the' outer bottoms '7a 7d are inclined toward the sides of the machine, and the inner bottoms 7b 7c terminate and deliver at points within the vertical planes at which the two outer bottoms 7ai 7d deliver, as shown in Fig. 5. The relative arrangements of the longitudinallyseparated bottoms 7 7b 'c '7d and the transverse sections or compartments of the same, as well as the vertical spouts 9a 9b 9c 9d, into which they respectively deliver, will' be understood upon reference to Fig. 3, where it will be seen that the two outer bottoms 7a 7d are broken away for a portion of their length in order to disclose where the inner bottoms 7b 7@ deliver. 9a 9d represent the vertical spouts into which the two outer bottoms deliver, and 9h 9c represent the two series of vertical spouts` into which the two inner bottoms deliver. It will be understood that the bot toms 7a 7d have their inner edges at about the same level as the inner edges of the bottoms 7b 7, as shown in Fig. 5; but the inclination of these bottoms causes the two inner bottoms to extend a certain distance beneath their outer bottoms, as will be understood from Figs. 3 and 5.

The next feature of my invention consists in arranging the vertical sponts 9n 9b 9c 9d, into which the respective bottoms 7 7b 7c 7 d empty,

in such a manner that it will be practicable' to gain access to t-he material delivered from all of said spouts at the sides of the machine. To provide for this, Iarrange said spouts on either side of the machine in the manner illustrated in Figs. 1 and 2, from which it will be seen that all of the spouts 9d, which communicate with the bottom 7 d, converge toward a middle line by forming them at suitable angles ot' inclination, and said spouts are connected by sleeves lOd with the receptacle 11d, located at an intermediate point of the ma- By this means the machine is` IIO . means of flexible sleeves with receptacles 11, into which they discharge. It will be understood that while I have shown this arrangement of the inner and outer spouts on one side of the machine only precisely the same arrangement is followed with the inner and outer spouts on the opposite side of the machine. It will also be understood that While I have shown the vertical spouts of the inner bottoms as diverging from an intermediate point, so as to deliver the material to the ends of the machine, and the vertical spouts of the outer bottoms converging, so as to deliver the material to an intermediate portion of the machine, this selection is merely arbitrary, and my invention will be fully carried out by reversing the order, for the salient feature of this part of my invention is in so distributing the hoppering that the delivery of material from all parts of the machine will be subject to examination at the sides. It will be seen upon reference to Figs. 1 and 2 that the receptacles 11c and 11d are provided with suitable cant-boards 12 of common construction,

Y whereby any portion of the material delivered into said receptacles may be directed as desired into different dscharge-spouts 13, leading to various points, according to the milling arrangements, as will be well understood without further description here. It will also be seen that the receptacles may be provided with doors 14, giving access to the interior for examination of the material.

15 represents the table upon which the screen rests and which receives the eccentric 16 of a rotating shaft 17, which may be driven through a pulley 1S from any suitable source of power.

19 represents straps which retain the screen in position, while yielding to its oscillation.

It will be understood that the sleeves 10a, 10", 10, and 10d are flexible, and thus offer no opposition to the oscillation of the screen and deliver the material into their respective receptacles 11a 11b 11C 11d.

A further feature of my invention consists in arranging lower transverse tailing-spouts 19 19b 19c 19(l for the lower sieves of the screen 1 and upper transverse tailing-spouts 20 2Ob 20c 2Od for the upper sieves all at one end of the machine and arranged at such inclinations, as shown by dotted lines in Fig. 5, that they will deliver through'end sleeves 21, dto. and 22, risc., into vertical inner and outer corner-receptacles 23a, dre., and 2t, dac.

The next feature of my improvement consists in providing beneath the sieve-cloth of flat sieves automatically moving brushes. One form of such brush is shown at 24 in Fig. 6, which is adapted to slide on ways 25 and which has suspended from it a pawl 26, which v drops into the notches of a bar 27. This construction is such that by the oscillation of the screen momentum i`s imparted in one direction to the brush 24, so that as the screen reverses its direction the brush continues in its initial movement until the pawl 26 passes to another notch. The recurring throw of the screen in the direction of the brushs movement imparts otherl impulses tothe latter, and the pawl passes from notch to notch. This action continues, and the brush is thereby given an intermittent progressive movement across the sieve. lVhen it reaches one end of the bar, the pawl drops into a depression 28, which permits it to reverse its position, and as the brush is started on its return movement by contact with the side of the screen the pawl engages in the rst notch at such an angle as to continue the movement of the brush to the opposite side until the pawl again drops into a depression and reverses. This movement is kept up continuously as long as the screen is oscillated. 29 represents a rod or wire, which may be located at any suitable fixed point for the purpose of bending over the bristles of the brush and releasing them with a snap, so as to cleanse them of material which would otherwise clog them. It is preferable to mount the brushes so that they will travel from side to side of the sieve, as otherwise they would tend to mix the material passing through different points in the length of the sieve and partly defeat the objects of other portions of my invention.

Fig. 7 illustrates a modified arrangement of brush, according to which the pawl is mounted upon the fixed bar 30, and the brushes 24 are carried by the notched bar 27, provided with depressions l28, and in which the action is substantially the same as described with reference to Fig. 6. The construction of the brushes and notched bar 27 is shown in plan in Fig. 8.

Fig. 9 represents aconstruction corresponding substantially to Fig. 6; but with the addition of trips 3l near the ends of the notched bar 27h, which engage projections 32 on the pawl 26 and reverse said pawl as the brush nears either limit of its movement, throwing it over into the depressions 2S. This construction is described, shown, and claimed in my application, Serial No. 716,722ffiled May 5, 1899.

Fig. 10 represents a construction in which a long brush 241y is employed. 25n is a parallel-link movement, whereby the brush is maintained in 'a position transverse to the line of travel. In this instance the notched bar 27 is curved to coincide with the pat-h of the pawl.

As heretofore stated, the bar 27 may have either a smooth or notched surface with which the pawl engages to advance the brush step by step. v

The relative positions of the cleaningbrushes will be observed upon examination of Figs. 1, 2, and 5. The details are not IOC IIO

shown in such figures, however, owing to the ing the screen into longitudinal outer and in-V ner sieve-compartments, the upper bottom located beneath the outer sieve-compartment and inclined toward the side of the screen, the lower bottom located beneath the innerl sievecompartment and partly beneath the upper bottom and inclined toward the side of the screen, the vertical transverse partitions dividing the bottoms beneath the longitudinal sieve-compartments into outer and inner series of compartments providing chutes, the outer series of spouts inclined longitudinally of the screen, and connected with the outer chutes, the inner series of spouts inclined longitudinally of the screen and connected with the inner chutes, an outer receptacle, flexible sleeves whereby the outer series of spouts are connected with the outer receptacle, an inner receptacle, iiexible sleeves whereby the inner series of spouts are connected with the inner receptacle, outer and inner end receptacles, outer and inner end spouts into which the tailings of the outer and inner sieves are discharged, and flexible slee ves whereby the end spouts are connected with the end receptacles.

2. A bolter comprising a shaking-'screen having a vertical longitudinal partition dividing the screen i'nto longitudinal inner and outer sieve-compartments, the inner bottom inclined beneath the inner and outer sievecompartments, toward the side of the screen, the outer bottom located partly over the inner bottom and inclined beneath the outer sieve compartment toward the side of the screen, the vertical transverse partitions dividing the bottoms beneath the longitudinal sieve-compartments into inner and `outer series of transverse compartments providing cut-offs, the inner series of spouts with which the inner cut-offs are connected, the outer series of spouts with which the outer cut-offs are connected, an inner receptacle, flexible sleeves whereby the inner series of spouts are connected with the inner receptacle, an outer receptacle, flexible sleeves whereby the outer series of spouts are connected with the outer receptacle, the lower and upper sieves located in the longitudinal sieve-compartments, the lower transverse tailing-spouts into which the lower sieves discharge, the upper transverse tailing-spouts into which the upper sieves discharge, the vertical inner and outer cornerreceptacles,the iiexible sleeves connecting the lower transverse tailing-spouts with an inner and outer corner-receptacle respectively, and

the eXible sleeves connecting the upper transverse tailing-spouts with the other inner and 4outer cornerreceptacles respectively; substantially as described.

3. The combination,with a sieve,and a cleaning-brush 5 of means for reciprocating the said brush comprising a pivoted pawl, and a bar having a surface, with which the said pawl engages to move the brush, and provided with means located at the ends of the said surface, whereby the pawl is automatically reversed at the end of each journey of the brush in either direction; substantially as described.

4. The combinatiomwith a sieve,and a cleaning-brush 5 of means for reciprocating the said brush, comprising ways on which the brush is adapted to slide, a pivoted pawl, and a bar having a surface with which the said pawl engages to move the brush, and provided with means, located at the ends of the said surface, whereby the pawl is automatically reversed at the end of each journey of the brush in either direction; substantially as described.

5. The combination ,with a sieve and a cleaning-brush; of means for reciprocating the said brush comprising a pivoted pawl, and a bar having a surface, with which the said pawl engages to move the brush, and provided with depressions located at the ends of the said surface, for permitting the automatic reversal of the pawl at the end of each journey of the brush in either direction; substantially as described.

6. The combination,withasieve,andaclean ing-brush of means for reciprocating the said brush comprising a pivoted pawl, a curved bar having a surface, with which the said pawl engages to move the brush, and provided with means, located at the ends of the said surface, whereby the pawl is automatically reversed at the end of each journey of the brush in either direction, and links connect ing the brush with the sieve, whereby a par allel movement is imparted to the brush; substantially as described.

7. The combinatiomwith a sieve,and a clean ing-brush; of means for reciprocating the said brush, comprising a pivoted pawl and a bar having a toothed surface, with which the said pawl engages to move the brush step by step and provided with means, located at the ends of the said surface, whereby the pawl is automatically reversed at the end of each journey of the brush in either direction; substantially as described.

8. The combination, with asieve, and cleaniug-brushes; of means for reciprocating the said brushes, comprising a fixed bar secured to the said sieve, a pivoted pawl supported by the said vfixed bar, and a bar carrying the brushes, having a surface, with which the said pawl engages to move the brushes, and

vprovided with means located at the ends of the said surface, whereby the pawl is automatically reversed at the end of each journey of the brushes in either direction; substantially as described.

9. A bolter comprising a sieve, a reciprocating cleaning-brush, means on which the brush is carried back and forth, an automaticallyreversing pawl, and a notched bar, with which IIO the pawl is adapted to engage to operate the brush, having depressions at the ends of the notched part in which the pawl reverses at the end of each journey of the brush; substantially as described.

lO. In combination With a cleaning-brush and a flour-bolt, t0 which it is relativelymovable, an automatically-reversing paWl engaging a part fixed relatively to the bolt and transmitting the vbratory motion of the bolt as a reciprocating impelling movement to the brush; substantially as herein explained.

11. In combination, with a our-bolt and its cleaning-brush, an automatically-reversing pawl, carried by one of said parts and an elongated track having a surface With Which the pawl engages carried by the other of said parts.

12. The combination of a shaking-sieve, a brush, means whereby the brush is loosely supported in contact with the sieve so as to permit it to-slide relatively to the sieve, a

pawl, and a notched bar having means at the ends 'thereof for the automatic reversal of the paWl; one member of the pawl and notched device being connected with the brush and the other member of the pawl and notched device being connected to the machine to cause the brush to be moved automatically and intermittently back and forth or vice versa against the sieve; by the movement of the sieve; substantially as described.

13. The combination of a shaking-sieve, a cleaning-brush, a paWl, and a notched bar having a depression at the end thereof into which the pawl may be free to move for reversing the paWl; the pawl and notched bar being adapted to impart a progressive movement to the brush; substantially as described.

WILLIAM L. BURNER. 

